限制库存不能大于现有库存

service/service_ly.go

@@ -342,9 +342,11 @@ func (ls *LyService) LyGoodsDetail(ctx context.Context, params RequestParams, go
 		//获取新的限制库存信息
 		has, limitStock := ls.getLimitStock(sku.GoodsId)
 		if has {
+			if int64(limitStock) < sku.Stock {
 				sku.Stock = int64(limitStock)
 				sku.BatchSn = "" //如果存在指定库存，则批次是空
 			}
+		}
 
 		sku = ls.GetStock(sku)